Permeable and Decomposable Plug Forming Rapidly Dehydrating Fluid (RDF)

ABSTRACT

A rapidly dehydrating fluid (RDF) composition that forms a permeable and decomposable plug and methods of lost circulation control and manufacture of the RDF composition. The RDF composition may include a carrier fluid such as water, a cellulosic microfiber viscosifier, date tree seed particles, and fibers formed from date tree waste such as date tree trunks. The RDF composition may mitigate or prevent lost circulation by forming a decomposable plug in a fracture of the lost circulation zone and may also enable the production of hydrocarbons from the zone without removal of the plug.

BACKGROUND Field of the Disclosure

The present disclosure generally relates to controlling lost circulationin a wellbore during drilling with a drilling fluid. More specifically,embodiments of the disclosure relate to a rapidly dehydrating fluid(RDF).

Description of the Related Art

Lost circulation is one of the frequent challenges encountered duringdrilling operations. Lost circulation can be encountered during anystage of operations and occurs when some or all of the drilling fluid(which may include drilling mud) pumped into a well does not return tothe surface. While a de minimis amount of fluid loss is expected,excessive fluid loss is not desirable from a safety, economical, orenvironmental point of view. Lost circulation is associated withproblems with well control, borehole instability, pipe sticking,unsuccessful production tests, poor hydrocarbon production after wellcompletion, and formation damage due to plugging of pores and porethroats by mud particles. In extreme cases, lost circulation problemsmay force abandonment of a well.

Lost circulation can occur in different formations such as naturallyfractured formations and cavernous formations. Lost circulation may alsooccur in weak formations due to the creation of induced fractures. Lostcirculation may happen in any other formations if a thief or loss zoneis available for the drilling fluid to escape from the wellbore.Formations such as shale, sands, gravel, shell beds, reef deposits,limestone, dolomite, and chalk can cause seepage, moderate or severedrilling fluid losses depending on the nature of the loss zones. Lostcirculation may also occur in the non-reservoir and the reservoirsections of a wellbore.

SUMMARY

Controlling loss of circulation in reservoir sections using conventionalLCMs may cause permanent sealing and plugging of the permeable channelsand fractures, thus preventing production of oil and gas resourcesthrough these permeable channels and fractures and impacting theultimate productivity of the well and the field. Consequently, certainLCMs have been developed for use in reservoir sections. For example,LCMs that are acid soluble are typically used in reservoir sections.

An acid treatment is typically performed before completing a well toremove the plug formed by an acid-soluble LCM and ensure productionthrough the conductive fracture channels. However, deep and long plugsformed in fractured loss zones may be difficult to treat using an aciddue to the difficulties of acid placement and entry at a relativelylarge distance from the wellbore. As a result, the acid treatment maynot restore production through these conductive fractures. Moreover, theacid treatment creates waste by-products that may cause more damage tonear-wellbore pay zones due to their dispersion, precipitation,cementation and blockage of permeable channels.

As an alternative to solid and acid-soluble plugs, some existingdeveloped LCMs may form permeable plugs in fractured loss zones to stopthe loss of whole mud while drilling but allow the production of oil andgas from these fractured channels due to the permeable nature of theplugs. However, due to progressive fouling of the permeable plugs by theprecipitations of solid particles, deposition of asphalt and oil slugs,creation of water and emulsion blockage, and other mechanisms, theproduction through the permeable plug matrix may be significantlyreduced over time. In extreme cases, production through these conductivechannels having the permeable plugs may cease completely. Although thepermeable plugs ensure production from conductive channels immediatelyafter the completion of a well, these existing techniques and LCMs maynot provide a sustainable production from conductive channels due to theprogressive fouling of the plugs.

Embodiments of the disclosure include a permeable- and decomposable-plugforming rapidly dehydrating fluid (RDF) for use as a lost circulationmaterial (LCM). The RDF may mitigate or prevent such lost circulation ina well and prevent or reduce the loss of drilling mud while drilling.The plug formed by the RDF of the disclosure may enable hydrocarbonproduction through the plug matrix at the early stages of production.The plug formed by the RDF may degrade over a time period without theuse of an acid to provide for increased hydrocarbon production through aconductive channel.

In some embodiments, a rapidly dehydrating fluid (RDF) composition isprovided. The RDF composition includes a carrier fluid, a cellulosicviscosifier, a plurality of particles formed from date tree seeds, and aplurality of date tree trunk fibers, the date tree trunk fibersincluding fibers formed from date tree trunks. In some embodiments, theRDF composition consists of the carrier fluid, the cellulosic microfiberviscosifier, the plurality of particles formed from date tree seeds, andthe plurality of date tree trunk fibers. In some embodiments, thecarrier fluid is water. In some embodiments, the cellulosic viscosifieris an amount in the range of 7 weight % of the total weight (w/w %) ofthe composition to about 8 w/w %. In some embodiments, the plurality ofparticles formed from date tree seeds is an amount in the range of 4weight % of the total weight (w/w %) to about 5 w/w %. In someembodiments, the plurality of date tree trunk fibers is an amount in therange of 3 weight % of the total weight (w/w %) to about 4 w/w %. Insome embodiments, each of the plurality of particles formed from datetree seeds has a size in the range of 400 microns to 595 microns. Insome embodiments, the RDF composition has a dehydration time of lessthan 2 minutes at 100 pounds-per-square inch differential (psid)pressure.

In another embodiments, a method control lost circulation in a loss zonein a wellbore is provided. The method includes introducing an rapidlydehydrating fluid (RDF) composition into the wellbore such that therapidly dehydrating fluid (RDF) composition contacts the loss zone andreduces a rate of lost circulation into the loss zone. The RDFcomposition includes a carrier fluid, a cellulosic viscosifier, aplurality of particles formed from date tree seeds, and a plurality ofdate tree trunk fibers, the date tree trunk fibers including fibersformed from date tree trunks. In some embodiments, the RDF compositionconsists of the carrier fluid, the cellulosic microfiber viscosifier,the plurality of particles formed from date tree seeds, and theplurality of date tree trunk fibers. In some embodiments, the carrierfluid is water. In some embodiments, the cellulosic viscosifier is anamount in the range of 7 weight % of the total weight (w/w %) to about 8w/w % In some embodiments, the plurality of particles formed from datetree seeds is an amount in the range of 4 weight % of the total weight(w/w %) to about 5 w/w %. In some embodiments, the plurality of datetree trunk fibers is an amount in the range of 3 weight % of the totalweight (w/w %) to about 4 w/w %. In some embodiments, each of theplurality of particles formed from date tree seeds has a size in therange of 400 microns to 595 microns. In some embodiments, the RDFcomposition has a dehydration time of less than 2 minutes at 100pounds-per-square inch differential (psid) pressure. In someembodiments, the method includes allowing a plug formed by the RDF todegrade over a time period.

In another embodiment, a method of manufacturing a rapidly dehydratingfluid (RDF) composition is provided. The method includes performing thefollowing steps in order: 1) mixing a carrier fluid and a cellulosicmicrofiber viscosifier to form a mixture, 2) mixing a plurality ofparticles formed from date tree seeds into the mixture, each of theplurality of particles formed from date tree seeds has a size in therange of 400 microns to 595 microns, and 3) mixing a plurality of datetree trunk fibers into the mixture, the date tree trunk fibers includingfibers formed from date tree trunks. In some embodiments, the carrierfluid is water. In some embodiments, the cellulosic viscosifier is anamount in the range of 7 weight % of the total weight (w/w %) to about 8w/w % In some embodiments, the plurality of particles formed from datetree seeds is an amount in the range of 4 weight % of the total weight(w/w %) to about 5 w/w %. In some embodiments, the plurality of datetree trunk fibers is an amount in the range of 3 weight % of the totalweight (w/w %) to about 4 w/w %.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a process for preparing and using a rapidlydehydrating fluid (RDF) composition in accordance with an embodiment ofthe disclosure; and

FIG. 2 is a photograph of an American Petroleum Society (API) filterpress and API test cell in accordance with an embodiment of thedisclosure.

DETAILED DESCRIPTION

The present disclosure will be described more fully with reference tothe accompanying drawings, which illustrate embodiments of thedisclosure. This disclosure may, however, be embodied in many differentforms and should not be construed as limited to the illustratedembodiments. Rather, these embodiments are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art.

Embodiments of the disclosure include a permeable- and decomposable-plugforming rapidly dehydrating fluid (RDF) for use as a lost circulationmaterial (LCM). The compositions described in the disclosure may thus bereferred to as a “rapidly dehydrating LCM” or “rapidly dehydrating LCMcomposition.” The rapidly dehydrating fluid may mitigate or prevent lostcirculation in a well and prevent or reduce the loss of drilling mudwhile drilling. The rapidly dehydrating fluid compositions described inthe disclosure may create a permeable and decomposable plug in afracture of a formation to reduce or prevent the loss of drilling mudinto the surrounding formation and enable production of hydrocarbonswithout removal of the plug (for example, via an acid treatment). Theplug formed by the rapidly dehydrating fluid compositions described inthe disclosure may have porosity-permeability (“poro-perm”)characteristics similar to formation rock to provide for theinfiltration of hydrocarbons through the plug matrix and enableproduction of hydrocarbons from the formation without removing the plugduring the entire life cycle of a well. The plug may degrade over timewithout the use of an acid treatment or other chemicals introduced intothe well. Further, the compositions described in this disclosure areeco-friendly, non-toxic, and environmentally safe such that the use ofsuch compositions for lost circulation control have little to nodetrimental effects on the subsurface environment and surroundingaquifers.

Additionally, the compositions described in this disclosure use rawmaterials that may be available locally and may encourage economic andjob growth of local industries, such as the date farming industry.Further, the production of compositions from locally available rawmaterials may reduce or eliminate the costs associated with theimportation and customs processing of conventional LCMs.

In some embodiments, a rapidly dehydrating fluid (RDF) composition (alsoreferred to as a loss control slurry) may include a carrier fluid, adate tree waste fibers, date tree seed particles, and a viscosifier. Thecarrier fluid may include water. The viscosifier may include a suitablecommercial viscosifier that can provide for rapid dehydration of theslurry at about 100 pounds-per-square inch differential (psid) to about500 psid overbalance pressure.

The RDF composition may include date tree waste fibers (for example,date tree trunk fibers). The date tree waste fibers may have a size(that is, length) greater than 0 and less than 2000 microns. In someembodiments, the date seed particles may have the sieve sizing shown inTable 1.

TABLE 1 SIEVE SIZING OF DATE TREE WASTE FIBERS Average Percentage MeshNo. Size (in microns) 4 ± 3% Retained No. 18 Retained >1000 (cut point<2000) 20 ± 10% Retained No. 30 Retained 600-1000 52 ± 12% Retained No.60 Retained 250-600 20 ± 10% Retained No. 100 Retained 150-250 4 ± 3%Retained No. 100 Passing through <150

In some embodiments, the RDF may include the date tree waste fibers inan amount of about 3 weight % of the total weight (w/w %) of thecomposition to about 4 w/w %. In some embodiments, the RDF compositionmay include the date tree waste fibers in an amount of about 3.5 w/w %.

The date tree waste fibers may be obtained from date tree waste, such aswaste produced as a by-product from date processing, date tree pruning,or both. In some embodiments, the date tree waste may be obtained fromdate processing plants to provide sustainable source of particulatematerial. Moreover, local sources of date tree waste may reduce the costof imported LCM products, components, or both. In some embodiments, thedate tree waste may be obtained from the species phoenix dactylifera. Itshould be appreciated that, in some embodiments, the date tree waste maybe obtained from genetically modified date trees (that is, geneticallymodified organisms (GMOs)). In some embodiments, the date tree waste isdate tree trunks, such that the RDF composition includes date tree trunkfibers. In some embodiments, the date tree trunks may be prepared bycleaning the date tree waste, such as by blowing air over the trunks toremove dust, rubbish, and other material, and then chopping, crushing,and grinding the trunks using an industrial grinder to produce date treewaste fibers. In some embodiments, the fibers may be sifted via one ormore sieves to obtain a desired size of the fibrous material for use inthe RDF composition described in the disclosure.

The RDF composition includes date tree seed particles formed from grounddate tree seeds. The date tree seed particles may have a size (forexample, diameter) in the range of about 400 microns to about 595microns. In some embodiments, the RDF may include the date tree seedparticles in an amount of about 4 w/w % to about 5 w/w %. In someembodiments, the RDF composition may include the date tree seedparticles in an amount of about 4.8 w/w %.

In some embodiments, the date tree waste fibers may include untreateddate tree waste fibers and the date seed particles may include untreateddate seed particles, thus preserving the environmentally-friendly andbiodegradable properties of the manufacturing process, the fibers, andthe resulting composition. As used in the disclosure, the term“untreated” or “without treating” refers to not treated with alkali oracid, not bleached, not chemically altered, not oxidized, and withoutany extraction or reaction process other than possibly drying of water.The term “untreated” or “without treatments” does not encompass grindingor heating to remove moisture but does encompass chemical or otherprocesses that may change the characteristics or properties of thefibers or particles. In such embodiments, the date tree waste fibers anddate tree seed particles may be manufactured without treating before,during, or after crushing, grinding, drying, or any other processing.

In some embodiments, the carrier fluid may be freshwater (water havingrelatively low (that is, less than 5000 parts-per-million (ppm))concentrations of total dissolved solids (TDS)), seawater (for example,water having a salinity in the range of about 30,000 to about 40,000 ppmTDS), artificial brines, natural brines, brackish water, or formationwater.

In some embodiments, the viscosifier may include a cellulosic microfiberderived from raw vegetable materials. In some embodiments, the RDFcomposition may include the cellulosic microfiber in an amount of about7 w/w % to about 8 w/w %. In some embodiments, the RDF composition mayinclude the cellulosic microfiber in an amount of about 7.2 w/w %. Insome embodiments, the viscosifier may be a non-toxic viscosifier havingcellulose in the range of about 5 w/w % to about 25 w/w % and water, anda pH in the range of about 3 to about 6. In some embodiments, theviscosifier may be Betafib® manufactured by Cosun Biobased Products ofRoosendaal, Netherlands.

The RDF composition may be manufactured from a mixture by performing thefollowing ordered steps (a) to (c):

(a) mixing water and the cellulosic viscosifier to form a mixture;

(b) mixing date seed particles into the mixture; and

(c) mixing the date tree waste fibers into the mixture.

As used herein, the term “mixture” may include a mix of solids or solidsand liquids.

The RDF composition may be formed by mixing the components in ahigh-speed mixer (for example, a commercial drilling fluid mixer) andforming a homogenous mixture, such as a homogenous slurry. In someembodiments, the RDF composition may be mixed for a time period (forexample, in a range of about 1 minutes to about 5 minutes) after eachstep (a)-(c). In some embodiments the RDF composition may be producedwithout any additives or treatments, thus preserving theenvironmentally-friendly and biodegradable properties of both themanufacturing process and the RDF composition.

The rapidly dehydrating fluid includes components that are physically,chemically, thermally, and biologically degradable. The plug formed bythe rapidly dehydrating fluid may degrade completely over a time period.In some embodiments, the plug formed by the rapidly dehydrating fluidmay degrade completely (that is, such that no components are present ina formed plug) in about 28 days. As a result of the degradation, thecomponents of the RDF may convert into carbon dioxide (CO₂), water, andresidual fines. The residual fines may be easily transportable by theflow of hydrocarbon fluid during the production phase of a well. Thus,the residual fines may be washed away by flowing hydrocarbon fluid,resulting in the complete opening of the fractures plugged by the RDFcomposition and enhancement of the well productivity in the later stagesof a well.

FIG. 1 depicts a process 100 for preparing and using a rapidlydehydrating fluid (RDF) composition in accordance with an embodiment ofthe disclosure. Initially, the RDF composition may be prepared from acellulosic viscosifier, date tree seed particles, and date tree wastefibers (for example, date tree trunk fibers) (block 102). The RDFcomposition may be formed by blending the RDF using a high-speed mixture(for example, a commercial drilling fluid mixture) to create ahomogenous RDF (block 104). For example, in some embodiments, the RDFcomposition may be formed by first mixing a carrier fluid (for example,water) and the cellulosic viscosifier to form a mixture, followed bymixing date seed particles into the mixture, followed by mixing the datetree waste fibers into the mixture, and mixing in a high-speed mixer(for example, a commercial drilling fluid mixture) to form a homogenousmixture. In some embodiments, the RDF composition may be mixed for atime period (for example, in a range of about 1 minutes to about 5minutes) after each step and mixed for another time period after allcomponents have been added. The RDF composition may form a pill (thatis, a fluid pill formed of the RDF composition).

The RDF may be pumped into a loss zone using an overbalance pressure inthe range of 100 psi to 500 psi. (block 106) In some embodiments, theRDF may be added to (for example, blended with) an oil-based drillingmud or a water-based drilling mud. In some embodiments, the RDF may beadded at the mud pit of a mud system. After addition of the RDF, thedrilling fluid having the RDF (that is, an altered drilling fluid) maybe circulated at a pump rate effective to position the RDF into contactwith a lost circulation zone in a wellbore. The placement of the RDF andthe overbalance pressure may enable the formation of plugs in fractures,gaps, and channels in the loss zone (block 108). For example, in someembodiments the plugs may form in less than about 2 minutes at apressure of about 100 psid. It should be appreciated that the timeperiod for formation of the plugs may be also be based on the type offormation (for example, the size of the fractures and fracture channelsin the formation).

The plugs formed by the RDF composition may be retained during theproduction phase of the well. Advantageously, the retention of the plugsavoids the use and introduction of acid (for example, hydrochloric acid)in the wellbore (referred to as “an acid treatment job”). Hydrocarbonsmay be produced from the loss zone having the permeable plugs such thatthe plugs prevent the loss of whole mud during the drilling phase do notneed to be removed during the production phase. After a time period, theplugs may degrade over time due to the degradable characteristics of thecellulosic viscosifier, date tree waste fibers, and date tree seedparticles (block 110). For example, the plugs may degrade in the laterstages of production from the well, such that the fractures and fracturechannels blocked by the plugs reopen after the plugs degrade. As notedin the disclosure, the eco-friendly, non-toxic, and environmentallyfriendly properties of the RDF composition may minimize or prevent anyenvironmental impact, any effect on ecosystems, habitats, population,crops, and plants surrounding the drilling site where the RDFcomposition is used. Moreover, the elimination of the use of acid toremove the plugs and being production from the well further minimizes orprevents further environment impact on ecosystems, habitats, population,crops, and plants surrounding the drilling site

Examples

The following examples are included to demonstrate embodiments of thedisclosure. It should be appreciated by those of skill in the art thatthe techniques and compositions disclosed in the example which followsrepresents techniques and compositions discovered to function well inthe practice of the disclosure, and thus can be considered to constitutemodes for its practice. However those of skill in the art should, inlight of the present disclosure, appreciate that many changes can bemade in the specific embodiments which are disclosed and still obtain alike or a similar result without departing from the spirit and scope ofthe disclosure.

The following non-limiting example of an RDF composition was preparedand evaluated to determine the rapidity of dehydration, the plug formingcapabilities, and the permeability of the formed plug. Table 2 shows theformulation of the example RDF composition used in the tests, with thecomposition of the components provided in milliliters (ml) or grams (g),and also expressed as weight of the total weight (w/w %):

TABLE 2 EXAMPLE RDF FORMULATION FOR TESTING Component Description AmountWater (ml) Carrier Fluid 350 Viscosifier (g) Betafib ® 15 (3.6 w/w %)Particulate Material (g) Ground date tree seeds 20 (4.8 w/w %) FibrousMaterial (g) Date Tree Waste Fibers 30 (7.2 w/w %)

As shown in Table 2, the example RDF formulation included a commerciallyavailable cellulosic microfiber viscosifier, Betafib®, manufactured byCosun Biobased Products of Roosendaal, Netherlands.

A rapidly dehydrating fluid (RDF) formulation was prepared by mixingeach component into a mixture using a high-speed mixer, in the ordershown in Table 2: Betafib® was added to the carrier fluid in themixture, followed by addition of date tree seed particles, followed byaddition of the date tree waste fibers. The rapidity of dehydration ofthe RDF was evaluated according to the tests described infra.

The example formulation RDF was tested using a commercially availableAmerican Petroleum Society (API) filter press to simulate relativelylarge fractures bounded by a formation having a relatively lowpermeability. The API filter press includes a test cell to contain thesample undergoing testing. FIG. 2 is a photograph of the API filterpress and API test cell in accordance with an embodiment of thedisclosure.

The formulation was testing using the following dehydration testprocedure:

1. Fill test cell of API filter press with a 350 cubic centimeter (cc)pill of the formulation;

2. Mount filtration cell to API filter press, affix the top lid, andconnect a pressure line of nitrogen gas at about 100 psid pressure; and

3. Measure the dehydration time of the pill (that is, the time for thefluid (about 350 cc) to be removed) at room temperature and 100 psidpressure and collect discarded fluid (that is, expelled carrier fluid)in a fluid collection pot at the bottom outlet of the API test cell.

It was observed that a continuous stream of fluid existing the API testcell was visible. The continuous stream of fluid in contrast to adroplet-like or dripping flow was an indication of rapid dehydration ofthe example RDF.

The results of the dehydration tests are shown in Table 3. Three testswere conducted on the example formulation RDF. Table 3 shows thedehydration time measured in minutes (min) and the thickness of the plugformed by the dehydrated pill measured in mm:

TABLE 3 RESULTS OF DEHYDRATION TEST Test No Test Parameter Results Test1 Dehydration Time (min) 1.15 Permeable Plug Thickness (mm) 40 Test 2Dehydration Time (min) 1.5 Permeable Plug Thickness (mm) 40 Test 3Dehydration Time (min) 1.5 Permeable Plug Thickness (mm) 41

As shown in Table 3, the example formulation RDF exhibited a dehydrationtime of less than 2 minutes. For commercial applications, a dehydrationtime of less than 4 minutes under 100 psid pressure indicates an RDFhaving greater than average performance. Thus, the example formulationRDF exceeded the industry accepted standard for rapid dehydrationperformance.

An oil flow test was also conducted at 100 psid to predict thehydrocarbon production capability of the plug. After the dehydrationtest procedure described supra and cessation of the fluid flow from theAPI test cell, the oil flow test was performed according to thefollowing procedure:

1. Release the pressure and remove the top lid of the API test cell.

2. Pour about 200 cc of oil on top of the plug, affix the top lid, andconnect the air pressure line of nitrogen gas at about 100 psidpressure; and

3. Collect the oil pushed through the plug matrix in a fluid collectionpot at the bottom outlet of the API test cell.

The results of the dehydration tests are shown in Table 4. Three testswere conducted on the example formulation RDF. Table 3 shows theeffluent time measured in minutes (min and the thickness of thedeposited plug measured in millimeters (mm):

TABLE 4 RESULTS OF OIL FLOW TIME TEST Oil Flow Test No Test ParameterTest Results Test 1 Oil Flow Time (min) 2.4 Perm Plug Thickness (mm) 40Test 2 Oil Flow Time (min) 2.32 Perm Plug Thickness (mm) 40 Test 3 OilFlow Time (min) 2.29 Perm Plug Thickness (mm) 41

As shown in Table 4, in each test the oil flowed through the plug matrixin less than 3 minutes. This flow of the oil through the plug matrixunder 100 psi pressure indicate the permeable nature of the plug formedby the example RDF formulation. Thus, the example RDF formulationdemonstrated the ability to form dual functional permeable plugs havinga first function of preventing the loss of whole mud while drilling anda second function of enabling hydrocarbon production from conductivefractures and permeable channels having the formed plugs.

Ranges may be expressed in the disclosure as from about one particularvalue to about another particular value or both. When such a range isexpressed, it is to be understood that another embodiment is from theone particular value to the other particular value or both along withall combinations within said range.

Further modifications and alternative embodiments of various aspects ofthe disclosure will be apparent to those skilled in the art in view ofthis description. Accordingly, this description is to be construed asillustrative only and is for the purpose of teaching those skilled inthe art the general manner of carrying out the embodiments described inthe disclosure. It is to be understood that the forms shown anddescribed in the disclosure are to be taken as examples of embodiments.Elements and materials may be substituted for those illustrated anddescribed in the disclosure, parts and processes may be reversed oromitted, and certain features may be utilized independently, all aswould be apparent to one skilled in the art after having the benefit ofthis description. Changes may be made in the elements described in thedisclosure without departing from the spirit and scope of the disclosureas described in the following claims. Headings used in the disclosureare for organizational purposes only and are not meant to be used tolimit the scope of the description.

1-8. (canceled)
 9. A method to control lost circulation in a loss zonein a wellbore, comprising: introducing a rapidly dehydrating fluid (RDF)composition into the wellbore such that the RDF composition contacts theloss zone and reduces a rate of lost circulation into the loss zone,wherein the RDF composition comprises: a carrier fluid; a cellulosicviscosifier; a plurality of particles formed from date tree seeds,wherein the plurality of particles formed from date tree seeds comprisesan amount of 4 weight % of the total weight (w/w %) to about 5 w/w % andeach of the plurality of particles formed from date tree seeds has asize of 400 microns to 595 microns; and a plurality of date tree trunkfibers, the date tree trunk fibers comprising fibers formed from datetree trunks, wherein the plurality of date tree trunk fibers comprisesan amount of 3 weight % of the total weight (w/w %) to about 4 w/w %,wherein the RDF composition has a dehydration time of less than 1.6minutes at 100 pounds-per-square inch differential (psid) pressure. 10.The method of claim 9, wherein the RDF consists of: the carrier fluid;the cellulosic viscosifier; the plurality of particles formed from datetree seeds; and the plurality of date tree trunk fibers, the date treetrunk fibers comprising fibers formed from date tree trunks.
 11. Themethod of claim 9, wherein the carrier fluid comprises water.
 12. Themethod of claim 9, wherein the cellulosic viscosifier comprises anamount of 7 weight % of the total weight (w/w %) to about 8 w/w %. 13.(canceled)
 14. (canceled)
 15. (canceled)
 16. (canceled)
 17. The methodof claim 9, comprising: forming a plug from the RDF in the loss zone;and allowing a plug formed by the RDF to degrade over a time period.18-22. (canceled)